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Updated: Feb 19, 2026

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Published on: February 28, 2016
Orbital angular momentum beam excitation using an all-fiber weakly fused mode selective coupler
Abstract:
Orbital angular momentum beam excitation through direct phase-matched coupling is experimentally demonstrated using an all-fiber weakly fused mode selective coupler consisting of a single-mode fiber and a ring-core fiber. Experimental results showing the excited OAM mode purity of up to 75% measured through the standard ring technique not only demonstrate the proof of concept but also provide a baseline for further improvement.
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